How to change web browser default zoom settings

I recently upgraded one of my monitors to a big screen. I needed to change the default zoom level in my web browser from 100% to 90%. Below are how to do it in Firefox and Chrome (Chromium).





In Firefox, download the add-on called: Zoom Page WE.  Then Firefox will open every time at the desired page zoom level. See the below options dialog box.



Located here: https://addons.mozilla.org/firefox/addon/zoom-page-we/


In Chrome, it is built in. Got to Settings, Appearance, and select the default zoom level.






Source: https://support.mozilla.org/en-US/questions/1187300